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Re: Popping through the carb problem. [Re: skicker] #1401726 03/13/13 08:38 PM 03/13/13 08:38 PM
Joined: Oct 2005 Posts: 5,024 WI Dcuda69 master
Dcuda69 master Joined: Oct 2005 Posts: 5,024 WI	Sure sounds like a cam lobe...really hope it's not!! BTDT not fun(or cheap) Good luck and let us know what ya find

Re: Popping through the carb problem. [Re: Challenger 1] #1401727 03/13/13 08:56 PM 03/13/13 08:56 PM
Joined: Dec 2003 Posts: 36,840 South San Francisco, Californi... MidPenMopar OP Looking for fun? Keep looking
MidPenMopar OP Looking for fun? Keep looking Joined: Dec 2003 Posts: 36,840 South San Francisco, Californi...	Quote: Stu, is there a reason you took down the picture of the 2 plugs? Yes that was just a stock photo and not indicitve of the one's i have. Here are my plugs as i just pulled them to check the condition so far. They seem to be fine but then they only have about 100 miles on them all so far. 7625041-Sparkplug3-13-13005.JPG (381 downloads)

Re: Popping through the carb problem. [Re: MidPenMopar] #1401728 03/13/13 09:04 PM 03/13/13 09:04 PM
Joined: Jul 2003 Posts: 5,188 upstate western ny sogtx master
sogtx master Joined: Jul 2003 Posts: 5,188 upstate western ny	Make sure your nuts/bolts that hold the carb to the manifold are torqued to a min of 150 in lbs . Not just tight by hand with a ratchet sometimes the stupidest things ... did you adjust timing this year , ? What else did you touch / change . go backwards . vacuum advance attached or plug fell off the port ? You just had a little surgery with the header change , something didnt go back together right . did it do it last year ? .. recheck your wires , buy some firewires with teh big numbers on them .. because you just did something , Ill bank on it not being a cam .. https://lh5.googleusercontent.com/-2TVoO...0429-MOTION.gif

Re: Popping through the carb problem. [Re: sogtx] #1401729 03/13/13 10:45 PM 03/13/13 10:45 PM
Joined: Jan 2007 Posts: 1,039 Redwood City Ca. B B1arno super stock
B1arno super stock B Joined: Jan 2007 Posts: 1,039 Redwood City Ca.	Just my two cents but, If my car was running well and I did a few things to it and it started running like crap, I would look really hard at what I did to make sure it was right and possibly start reversing things to see if it cleared up. Arno

Re: Popping through the carb problem. [Re: B1arno] #1401730 03/13/13 11:13 PM 03/13/13 11:13 PM
Joined: Dec 2003 Posts: 36,840 South San Francisco, Californi... MidPenMopar OP Looking for fun? Keep looking
MidPenMopar OP Looking for fun? Keep looking Joined: Dec 2003 Posts: 36,840 South San Francisco, Californi...	Quote: Just my two cents but, If my car was running well and I did a few things to it and it started running like crap, I would look really hard at what I did to make sure it was right and possibly start reversing things to see if it cleared up. Arno You know it's not running bad it runs just fine except for that popping at low RPMs. That's why it hard to diagnose, im going to try new plugs first and see if that helps??

Re: Popping through the carb problem. [Re: dodgedon] #1401731 03/13/13 11:25 PM 03/13/13 11:25 PM
Joined: Aug 2007 Posts: 902 Seattle, WA R rss super stock
rss super stock R Joined: Aug 2007 Posts: 902 Seattle, WA	Quote: I'm going to say its too lean. The same as when its not up to temp. I have had this problem with Eddy carbs before. More so on trucks... When under load they pop back. You can have the same effect when the choke is off and the engine has not completely warmed up. Lean pop... I'd be looking for an intake/vacuum leak and then start going through the carb.

Re: Popping through the carb problem. [Re: MidPenMopar] #1401732 03/13/13 11:47 PM 03/13/13 11:47 PM
Joined: Jan 2007 Posts: 1,039 Redwood City Ca. B B1arno super stock
B1arno super stock B Joined: Jan 2007 Posts: 1,039 Redwood City Ca.	Quote: Quote: Just my two cents but, If my car was running well and I did a few things to it and it started running like crap, I would look really hard at what I did to make sure it was right and possibly start reversing things to see if it cleared up. Arno You know it's not running bad it runs just fine except for that popping at low RPMs. That's why it hard to diagnose, im going to try new plugs first and see if that helps?? Thats what I would do. Change back one at a time what you can to see if that makes the difference.

Re: Popping through the carb problem. [Re: B1arno] #1401733 03/14/13 01:00 AM 03/14/13 01:00 AM
Joined: Feb 2010 Posts: 18,493 Granite Bay CA Kern Dog Striving for excellence
Kern Dog Striving for excellence Joined: Feb 2010 Posts: 18,493 Granite Bay CA	Sorta unrelated but here goes: Last year I installed a Gear Vendors overdrive unit. To get it to fit, I had to cut out the exhaust crossover pipe. The engine sits in the car a bit out of level, so I tried to clock it after loosening the motor mount nuts. I laid a 2 foot level across the valve covers, but I had to spin the distributor a few degrees because the vacuum can was in the way....After the GV was in, I drove to the exhaust/muffler shop. The car ran terrible and was really slow turning over. It pinged & detonated even at light throttle. I pulled over about a mile after leaving and clocked the distributor until the car ran like before. That wasn't all though. I had also removed the valve cover breather. I noticed a CLANG then saw a chrome ball rolling behind me as I was rolling at about 50 mph. (What the heck was tha..... Oh, I know what it was) The point is, it was good advice from the guy who suggested to try looking at the changes you made.

Re: Popping through the carb problem. [Re: MidPenMopar] #1401734 03/14/13 06:54 AM 03/14/13 06:54 AM
Joined: Feb 2005 Posts: 28,312 Cincinnati, Ohio Challenger 1 Too Many Posts
Challenger 1 Too Many Posts Joined: Feb 2005 Posts: 28,312 Cincinnati, Ohio	Are you sure those are the correct style plugs for your heads, they look awfully short to me? My 440 heads take a long reach plug. Then use just a drop or two of motor oil on the the threads, no anti seize, imo. Good luck to you!

Re: Popping through the carb problem. [Re: Challenger 1] #1401735 03/14/13 08:00 AM 03/14/13 08:00 AM
Joined: Jan 2004 Posts: 27,347 Today? Who Knows? 1_WILD_RT Management Trainee
1_WILD_RT Management Trainee Joined: Jan 2004 Posts: 27,347 Today? Who Knows?	Quote: Are you sure those are the correct style plugs for your heads, they look awfully short to me? My 440 heads take a long reach plug. Then use just a drop or two of motor oil on the the threads, no anti seize, imo. Good luck to you! Stock heads like Stu runs take short reach plugs, Edelbrock's take long reach plugs.. Small blocks take long reach... For Stu's car those look Ok but I'd still screw in a set of NGK's just to see were it puts him.. "The Armies of our ancestors were lucky, in that they were not trailed by a second army of pencil pushers."

Re: Popping through the carb problem. [Re: 1_WILD_RT] #1401736 03/14/13 08:28 AM 03/14/13 08:28 AM
Joined: Feb 2005 Posts: 28,312 Cincinnati, Ohio Challenger 1 Too Many Posts
Challenger 1 Too Many Posts Joined: Feb 2005 Posts: 28,312 Cincinnati, Ohio	Quote: Quote: Are you sure those are the correct style plugs for your heads, they look awfully short to me? My 440 heads take a long reach plug. Then use just a drop or two of motor oil on the the threads, no anti seize, imo. Good luck to you! Stock heads like Stu runs take short reach plugs, Edelbrock's take long reach plugs.. Small blocks take long reach... For Stu's car those look Ok but I'd still screw in a set of NGK's just to see were it puts him.. Thanks

Re: Popping through the carb problem. [Re: MidPenMopar] #1401737 03/14/13 09:14 AM 03/14/13 09:14 AM
Joined: Jul 2005 Posts: 1,954 Blairsden, CA T Triggerfish top fuel
Triggerfish top fuel T Joined: Jul 2005 Posts: 1,954 Blairsden, CA	The 70 383 Mag in my Power Wagon did the same thing. Eddy 600 AFB, larger, high 400's cam & not much torque to get the beast rolling. I added a 1" four hole phenolic spacer & that helped the carb signal, but it would still pop off idle at a light if I wasn't careful. Leak down test revealed two dead cylinders & my hands would get wet with fuel when I held them over the tail pipes. I suspected a blown head gasket between cylinders, but when disassembled to install new heads & smaller cam, turns out the orig heads did not have hardened seats & the exhaust valves were sunk into the head so far, they weren't sealing at all, allowing the intake charge to go right out the exhaust & causing a lean condition. New heads with hardened seats, smaller torque cam & viola, no more popping thrut he carb. The other guys like Randy, who're a lot more mechanic savy than me, might chime in about burnt valves causing the popping. 7625555-Newcoversinstalled.jpg (290 downloads)

Re: Popping through the carb problem. [Re: Triggerfish] #1401738 03/14/13 09:27 AM 03/14/13 09:27 AM
Joined: Dec 2003 Posts: 36,840 South San Francisco, Californi... MidPenMopar OP Looking for fun? Keep looking
MidPenMopar OP Looking for fun? Keep looking Joined: Dec 2003 Posts: 36,840 South San Francisco, Californi...	I will get a new set of regular plugs and see what happens when i install them without the anti sieze on the theads. Maybe these shortie plugs are to blame for the problem?? Personally i think it's an issue with fuel loading up in the carb due to the transmission getting into overdrive too quickly. I say this as if i shift manually and stay out of overdrive untill over 2500 RPM the problem does not happen. I can stand on it and let the transmission shift automaticly and no popping issue all the way to redline....

Re: Popping through the carb problem. [Re: 1_WILD_RT] #1401739 03/14/13 01:23 PM 03/14/13 01:23 PM
Joined: Jan 2003 Posts: 21,129 Niles , Ohio T therocks oh wait.but hey.lets see.oh yeah.
therocks oh wait.but hey.lets see.oh yeah. T Joined: Jan 2003 Posts: 21,129 Niles , Ohio	Try a set of NGK plugs.they are cheap and work.I run them in my aluminum headed 440 with 12.5 domes on the street.I also dont care for Accel wires.I run Taylors on everything.Mine with 2 inch TTIS have been on at least 12 years.My kids 413 with 2 1/8 tubes have been on 5 years with no problems.He runs my old worked 516s with NGK plugs.You migh also have a valve thats just barely burnt.Compression test would tell.Also to check timing chain.Turn crank to zero.Then while someone watches manually turn it back till the dist moves moves.I like to see less than 10 degrees on an old chain.Rocky Chrysler Firepower

Re: Popping through the carb problem. [Re: MidPenMopar] #1401740 03/14/13 02:52 PM 03/14/13 02:52 PM
Joined: Aug 2006 Posts: 2,568 God's Country Maryland GODSCOUNTRY340 master
GODSCOUNTRY340 master Joined: Aug 2006 Posts: 2,568 God's Country Maryland	A burnt valve wouldn't cause popping through the carb. You'd have a dead cylinder and/or popping out the exhaust with a burnt valve. Exhaust valves are the ones that get burnt. I've NEVER seen a burnt intake valve. I love the smell of Deer guts in the morning, it smells like... VICTORY!

Re: Popping through the carb problem. [Re: GODSCOUNTRY340] #1401741 03/14/13 03:36 PM 03/14/13 03:36 PM
Joined: Jan 2003 Posts: 2,931 P Paul_Fancsali master
Paul_Fancsali master P Joined: Jan 2003 Posts: 2,931	Replace the accel plugs J-12Y or RJ12-Y the accell are too cold period

Re: Popping through the carb problem. [Re: GODSCOUNTRY340] #1401742 03/14/13 05:14 PM 03/14/13 05:14 PM
Joined: Jul 2005 Posts: 1,954 Blairsden, CA T Triggerfish top fuel
Triggerfish top fuel T Joined: Jul 2005 Posts: 1,954 Blairsden, CA	You're right & it was popping thru the carb, but that must've been because of a lean condition. The cam was way to big for the truck & I read in the Eddy manual that big cams can cause a lean condition off idle? It only backfired thru the tail pipe a couple of times when first starting up. Last edited by Triggerfish; 03/14/13 11:02 PM.

Re: Popping through the carb problem. [Re: Paul_Fancsali] #1401743 03/14/13 06:35 PM 03/14/13 06:35 PM
Joined: Dec 2003 Posts: 36,840 South San Francisco, Californi... MidPenMopar OP Looking for fun? Keep looking
MidPenMopar OP Looking for fun? Keep looking Joined: Dec 2003 Posts: 36,840 South San Francisco, Californi...	Quote: Replace the accel plugs J-12Y or RJ12-Y the accell are too cold period I just got a set of Ac Delco R435 plugs to try this time.

Re: Popping through the carb problem. [Re: MidPenMopar] #1401744 03/15/13 07:46 PM 03/15/13 07:46 PM
Joined: Jan 2003 Posts: 1,824 McGregor,Iowa 52157 5 500ciDuster top fuel
500ciDuster top fuel 5 Joined: Jan 2003 Posts: 1,824 McGregor,Iowa 52157	I had A 360 and it did that because it rounded a cam lobe off

Re: Popping through the carb problem. [Re: 500ciDuster] #1401745 03/15/13 08:37 PM 03/15/13 08:37 PM
Joined: Dec 2003 Posts: 36,840 South San Francisco, Californi... MidPenMopar OP Looking for fun? Keep looking
MidPenMopar OP Looking for fun? Keep looking Joined: Dec 2003 Posts: 36,840 South San Francisco, Californi...	Put in the new plugs and it fired up nicely and sounds a little better. I will take a test run tomorrow and see if the new plugs did any good?

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